:root{--ink:#23201c;--muted:#6b645b;--bg:#fbf7f1;--card:#ffffff;--line:#e7dfd3;--accent:#0f766e;--accent-ink:#ffffff;--warm:#c2410c;--good:#15803d;--bad:#b91c1c;--soft:#f1ebe2}*{box-sizing:border-box}body,html{margin:0;background:var(--bg);color:var(--ink);font-family:ui-rounded,SF Pro Rounded,Segoe UI,system-ui,-apple-system,sans-serif;font-size:18px;line-height:1.5}a{color:var(--accent)}.wrap{max-width:860px;margin:0 auto;padding:0 18px}.row{display:flex;align-items:center;flex-wrap:wrap;gap:10px}.between{justify-content:space-between}.gap{gap:18px}.top{background:var(--card);border-bottom:1px solid var(--line)}.top .wrap{padding-top:12px;padding-bottom:12px}.logo{font-weight:800;text-decoration:none;color:var(--ink);font-size:20px}.mark{display:inline-grid;place-items:center;width:34px;height:34px;border-radius:10px;background:var(--warm);color:#fff;font-size:14px;margin-right:6px}.nav{display:flex;gap:14px;flex-wrap:wrap}.nav a{text-decoration:none;color:var(--ink);font-weight:600;font-size:16px}.notice{background:#fff4e5;color:#7c2d12;font-size:14px;text-align:center;padding:6px 12px;border-top:1px solid #fde2c0}main.wrap{padding-top:24px;padding-bottom:48px;min-height:60vh}h1{font-size:34px;line-height:1.15;margin:8px 0 12px}h2{font-size:24px;margin:28px 0 10px}.lead{font-size:20px;color:var(--muted)}.card{background:var(--card);border:1px solid var(--line);border-radius:16px;padding:20px;margin:14px 0}.grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));grid-gap:14px;gap:14px}.tile{display:block;text-decoration:none;color:var(--ink);background:var(--card);border:1px solid var(--line);border-radius:16px;padding:18px}.tile:hover{border-color:var(--accent)}.tile strong{display:block;font-size:20px;margin-bottom:4px}.btn{-webkit-appearance:none;-moz-appearance:none;appearance:none;border:0;border-radius:12px;padding:12px 18px;font:inherit;font-weight:700;background:var(--accent);color:var(--accent-ink);cursor:pointer;min-height:48px}.btn:disabled{opacity:.45;cursor:default}.btn.ghost{background:var(--soft);color:var(--ink)}.btn.live{background:var(--warm)}.answer input{width:100%;font:inherit;padding:14px;border-radius:12px;border:2px solid var(--line);margin-bottom:10px;background:#fff}.answer input:focus{outline:none;border-color:var(--accent)}.muted{color:var(--muted)}.small{font-size:15px}.q{font-size:26px;line-height:1.3;margin:8px 0 16px}.good,.q{font-weight:700}.good{color:var(--good)}.bad{color:var(--bad)}.bad,.pill{font-weight:700}.pill{display:inline-block;border-radius:999px;padding:4px 12px;font-size:14px}.pill,.seg{background:var(--soft)}.seg{display:inline-flex;border-radius:12px;padding:4px;gap:4px}.seg button{border:0;background:transparent;font:inherit;font-weight:700;padding:8px 14px;border-radius:9px;cursor:pointer}.seg button[aria-pressed=true]{background:#fff;box-shadow:0 1px 3px rgba(0,0,0,.12)}ul.ans{margin:6px 0;padding-left:22px}.word{display:inline-block;padding:2px 6px;margin:2px;border-radius:6px;font-size:24px}.word.hit{background:#dcfce7}.word.miss{background:#fee2e2}.big{font-size:28px;font-weight:700}.foot{border-top:1px solid var(--line);background:var(--card);font-size:15px;color:var(--muted);padding:18px 0 30px}details summary{cursor:pointer;font-weight:700}table{border-collapse:collapse;width:100%}td,th{text-align:left;padding:6px;border-bottom:1px solid var(--line);vertical-align:top}@media (max-width:560px){h1{font-size:28px}.q{font-size:22px}}.code{font-family:ui-monospace,Menlo,Consolas,monospace;font-size:20px;font-weight:700;background:var(--soft);border-radius:10px;padding:10px 12px;word-break:break-all;-webkit-user-select:all;-moz-user-select:all;user-select:all}.paywall{border-color:var(--accent)}